词根词缀：quinqu-, quinqua-, quinque-

【来源及含义】Latin: five, fifth; a word element for number 5

【同源单词】quinquagenarian, quinquagenary, Quinquagesima, quinquagesimal, quinquangular, quinquefarious

词根词缀：valvulo-, valvul-

【来源及含义】Latin: a doorlike structure in a passageway that hinders or prevents the reflux or flowing back of its contents

【同源单词】bivalve, bivalved, bivalvular, cardiovalvulitis, equivalve, equivalvular